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Contrast Checker

Check color contrast ratios and WCAG accessibility compliance.

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Large sample textSmall text to test readability on this background. Sphinx of black quartz, judge my vow.— live preview
Contrast ratio13.34:1
Good
AA · small textMin 4.5:1Pass
AA · large textMin 3.0:1Pass
AAA · small textMin 7.0:1Pass
AAA · large textMin 4.5:1Pass

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Contrast Checker — WCAG Accessibility

Check WCAG contrast ratios for accessibility. Ensure your design meets AA and AAA standards.

Quick answer: Contrast Checker

Contrast Checker calculates the ratio between foreground and background colors to help assess WCAG targets. Enter two colors, review the ratio and text-size statuses, then adjust the pair before using it.

Input
Foreground and background colors.
Output
A contrast ratio and available pass indicators.
Know before use
Color ratio is only one part of accessibility; size, weight, interactive states, background images, and user needs still require testing.
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  • ✓Works on desktop and mobile
  • ✓Privacy-first: your data never leaves your device

How to Use

  1. 1
    Prepare the input

    Foreground and background colors.

  2. 2
    Configure and process

    Contrast Checker calculates the ratio between foreground and background colors to help assess WCAG targets. Enter two colors, review the ratio and text-size statuses, then adjust the pair before using it.

  3. 3
    Review the result

    A contrast ratio and available pass indicators.

What do I need to use Contrast Checker?

Foreground and background colors.

What does Contrast Checker produce?

A contrast ratio and available pass indicators.

What are the limitations of Contrast Checker?

Color ratio is only one part of accessibility; size, weight, interactive states, background images, and user needs still require testing.